I don’t know of any IVF procedure that does not involve the destruction of embryos. If the procedure can be accomplished without the destruction of embryos it is still not morally licit. Since it is an offense against marriage I think the canonical (is that the right term) penalty would be same as for other such offenses like the use of artificial contraceptives. I do not know what that would be.
Thank you for this explanat5ion.
I know that artificial conception, like artificial contraception, is a grave offense against the dignity of marriage (because it separates the sacred signs of lovemaking and life-making) and the dignity of the conceived child (because it treats him as a product/commodity, not a gift of the love embrace.)
However, I don't think artificial conception or contraception per se incur automatic excommunication. It's bad enough that they're mortal sins!